摘要
流体在多孔介质空隙内的流动非常复杂,采用常规的实验方法,测量流速分布的数据非常有限,并且有可能破坏流场结构。为了研究不同Re下,结构化填充床流通区域内不同截面的流速分布情况,采用CFD方法进行数值研究,定量分析孔隙内的流动特性。研究结果表明:在层流范围内,当Re较小时,随着流通截面积的增大,流速降低得非常明显,粘性力起主要作用;当Re增大到204.74时,流速降低的速度不再明显,此时惯性力在流动过程中起主导作用,数值模拟结果与实验值取得了定性的一致。
Fluid flow in the pores of porous media is very complex. The data of flow distribution in the pore by the traditional experimental method is very limited and this may destroy the flow structure under this method. In order to study the flow velocity distribution in the region in different cross section of a structured packed bed at different Re number, the fluid flow in a structured packed bed was studied using CFD method and flow characteristics in the pore were analyzed with quantitative analysis. Results show that the velocity decreases greatly and the viscous force is dominant when increasing the flow area within the scope of laminar flow and a small Re number. When the Re increases to 204.74, the decrease in the velocity is not obviously observed and the inertial force is dominant in the fluid flow. The numerical predictions were verified by the experimental results.
出处
《沈阳工程学院学报（自然科学版）》
2016年第3期208-212,共5页
Journal of Shenyang Institute of Engineering:Natural Science
基金
国家自然科学基金资助项目(51406123)
关键词
多孔介质
数值研究
层流
填充床
Porous media
numerical simulation
laminar
packed bed
